The labor ministry said Tuesday that the internal radiation exposure of 142 workers involved in emergency operations at the crippled Fukushima No. 1 nuclear power plant was higher than reported by plant operator Tokyo Electric Power Co.
After recalculating data provided by Tepco, the Health, Labor and Welfare Ministry found that a male employee was exposed to 180 millisieverts, exceeding the 100-millisievert level that is said to raise the risk of cancer. The man’s exposure was initially reported to be around 90 millisieverts.
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